|Treaty|Organization|Introduced|Signed|Ratified|
|---|---|---|---|---|
|Convention on the Prevention and Punishment of the Crime of Genocide|United Nations|1948|-|1958|
|International Convention on the Elimination of All Forms of Racial Discrimination|United Nations|1966|1967|1970|
|International Covenant on Economic, Social and Cultural Rights|United Nations|1966|1977|1979|
|International Covenant on Civil and Political Rights|United Nations|1966|1977|1979|
|First Optional Protocol to the International Covenant on Civil and Political Rights|United Nations|1966|-|-|
|Convention on the Non-Applicability of Statutory Limitations to War Crimes and Crimes Against Humanity|United Nations|1968|-|-|
|International Convention on the Suppression and Punishment of the Crime of Apartheid|United Nations|1973|-|-|
|Convention on the Elimination of All Forms of Discrimination against Women|United Nations|1979|-|1993|
|Convention against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment|United Nations|1984|1986|1993|
|Convention on the Rights of the Child|United Nations|1989|1990|1993|
|Second Optional Protocol to the International Covenant on Civil and Political Rights, aiming at the abolition of the death penalty|United Nations|1989|-|-|
|International Convention on the Protection of the Rights of All Migrant Workers and Members of Their Families|United Nations|1990|1991|1993|
|Optional Protocol to the Convention on the Elimination of All Forms of Discrimination against Women|United Nations|1999|-|-|
|Optional Protocol to the Convention on the Rights of the Child on the Involvement of Children in Armed Conflict|United Nations|2000|2000|2002|
|Optional Protocol to the Convention on the Rights of the Child on the Sale of Children, Child Prostitution and Child Pornography|United Nations|2000|2000|2001|
|Convention on the Rights of Persons with Disabilities|United Nations|2006|2007|2009|
|Optional Protocol to the Convention on the Rights of Persons with Disabilities|United Nations|2006|-|2009|
|International Convention for the Protection of All Persons from Enforced Disappearance|United Nations|2006|2007|2013|
|Optional Protocol to the International Covenant on Economic, Social and Cultural Rights|United Nations|2008|-|-|
|Optional Protocol to the Convention on the Rights of the Child on a Communications Procedure|United Nations|2011|2012|-|

Question: how many total international human rights treaties from the united nations has monaco ratified?
Answer: 13